This machine lifts fingers starting at pinky one at at time and then drops them one at a time. I can’t actually master that move smoothly with my real hand in 30 seconds of trying. It will give me something to practice in Christmas travel lineups…
I lift all my fingers at once and then drop them one at a time. If it matched the physical movement the piece would give a better impression of impatience. It seems to just need a slightly more clever tie rod.